package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Transactional(rollbackFor = Exception.class)
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //插入1条菜品
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        //插入n条菜品口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            //设置菜品id
            flavors.forEach(df -> {df.setDishId(dishId);});
            dishFlavorMapper.insertBatch(flavors);
        }






    }

    /**
     * 分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        long total = page.getTotal();
        List<DishVO> dish = page.getResult();
        return new PageResult(total,dish);
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional(rollbackFor = Exception.class)
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够被删除--是否存在起售中的菜品
        for(Long id : ids){
          Dish dish = dishMapper.getById(id);
          if(dish.getStatus() == StatusConstant.ENABLE){
              //当前菜品处于起售状态，不能删除
              throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
          }
        }
        //判断当前菜品是否能够被删除--是否关联了套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds !=null && setmealIds.size()>0){
            //当前菜品关联了套餐，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        for (Long id : ids) {
            //删除菜品表中的菜品数据
            dishMapper.deleteById(id);
            //删除菜品表中的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    /**
     * 根据id查询菜品和对应的口味数据
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
      DishVO dishVO = new DishVO();
      Dish dish = dishMapper.getById(id);
      List<DishFlavor> dishFlavor = dishFlavorMapper.getByDishId(id);
      BeanUtils.copyProperties(dish, dishVO);
      dishVO.setFlavors(dishFlavor);
      return dishVO;
    }

    /**
     * 修改菜品和对应的口味
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //更新菜品表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //更新口味表
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null && flavors.size()>0){
            //先删除原有的口味表
            dishFlavorMapper.deleteByDishId(dishDTO.getId());
            //再插入新的口味表
            flavors.forEach(df -> {df.setDishId(dishDTO.getId());});
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 根据分类id查询菜品
     * @param dish
     * @return
     */
    @Override
    public List<Dish> list(Dish dish) {
        List<Dish> dishes= dishMapper.list(dish);
        return dishes;
    }

    /**
     * 根据分类id条件查询菜品和对应的口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {

        //根据分类id查询菜品
        List<Dish> dishes = dishMapper.list(dish);
        //根据菜品id查询对应的口味
        if(dishes!=null && dishes.size()>0){
            List<DishVO> dishVOS = new ArrayList<>();
            for (Dish d : dishes) {
                DishVO dishVO = new DishVO();
                BeanUtils.copyProperties(d, dishVO);
                List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(d.getId());
                dishVO.setFlavors(dishFlavors);
                dishVOS.add(dishVO);
            }
            return dishVOS;
        }
        return null;
    }

    /**
     * 起售停售
     * @param status
     * @param id
     *
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }
}
